/*
 * ====================================================
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
 *
 * Developed at SunPro, a Sun Microsystems, Inc. business.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice
 * is preserved.
 * ====================================================
 */

/*
 * from: @(#)fdlibm.h 5.1 93/09/24
 * $FreeBSD$
 */

#ifndef _MATH_H_
#define _MATH_H_

#include <sys/cdefs.h>
#include <limits.h>

#if !defined(__BIONIC_NO_MATH_INLINES)
#define __BIONIC_MATH_INLINE(__def) extern __inline__ __always_inline __attribute__((gnu_inline)) __attribute__((__artificial__)) __def
#else
#define __BIONIC_MATH_INLINE(__def)
#endif

__BEGIN_DECLS
#pragma GCC visibility push(default)

#define HUGE_VAL    __builtin_huge_val()

#if __ISO_C_VISIBLE >= 1999
#define FP_ILOGB0   (-INT_MAX)
#define FP_ILOGBNAN INT_MAX

#define HUGE_VALF   __builtin_huge_valf()
#define HUGE_VALL   __builtin_huge_vall()
#define INFINITY    __builtin_inff()
#define NAN     __builtin_nanf("")

#define MATH_ERRNO  1
#define MATH_ERREXCEPT  2
#define math_errhandling    MATH_ERREXCEPT

#if defined(__FP_FAST_FMA)
#define FP_FAST_FMA 1
#endif
#if defined(__FP_FAST_FMAF)
#define FP_FAST_FMAF 1
#endif
#if defined(__FP_FAST_FMAL)
#define FP_FAST_FMAL 1
#endif

/* Symbolic constants to classify floating point numbers. */
#define FP_INFINITE 0x01
#define FP_NAN      0x02
#define FP_NORMAL   0x04
#define FP_SUBNORMAL    0x08
#define FP_ZERO     0x10
#define fpclassify(x) \
    __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, FP_ZERO, x)

#define isfinite(x) __builtin_isfinite(x)
#define isinf(x) __builtin_isinf(x)
#define isnan(x) __builtin_isnan(x)
#define isnormal(x) __builtin_isnormal(x)

#define isgreater(x, y) __builtin_isgreater((x), (y))
#define isgreaterequal(x, y) __builtin_isgreaterequal((x), (y))
#define isless(x, y) __builtin_isless((x), (y))
#define islessequal(x, y) __builtin_islessequal((x), (y))
#define islessgreater(x, y) __builtin_islessgreater((x), (y))
#define isunordered(x, y) __builtin_isunordered((x), (y))

#define signbit(x) \
    ((sizeof(x) == sizeof(float)) ? __builtin_signbitf(x) \
    : (sizeof(x) == sizeof(double)) ? __builtin_signbit(x) \
    : __builtin_signbitl(x))

typedef double __double_t;
typedef __double_t double_t;
typedef float __float_t;
typedef __float_t float_t;
#endif /* __ISO_C_VISIBLE >= 1999 */

/*
 * XOPEN/SVID
 */
#if __BSD_VISIBLE || __XSI_VISIBLE
#define M_E     2.7182818284590452354   /* e */
#define M_LOG2E     1.4426950408889634074   /* log 2e */
#define M_LOG10E    0.43429448190325182765  /* log 10e */
#define M_LN2       0.69314718055994530942  /* log e2 */
#define M_LN10      2.30258509299404568402  /* log e10 */
#define M_PI        3.14159265358979323846  /* pi */
#define M_PI_2      1.57079632679489661923  /* pi/2 */
#define M_PI_4      0.78539816339744830962  /* pi/4 */
#define M_1_PI      0.31830988618379067154  /* 1/pi */
#define M_2_PI      0.63661977236758134308  /* 2/pi */
#define M_2_SQRTPI  1.12837916709551257390  /* 2/sqrt(pi) */
#define M_SQRT2     1.41421356237309504880  /* sqrt(2) */
#define M_SQRT1_2   0.70710678118654752440  /* 1/sqrt(2) */

#define MAXFLOAT    ((float)3.40282346638528860e+38)
extern int signgam;
#endif /* __BSD_VISIBLE || __XSI_VISIBLE */

#if __BSD_VISIBLE
#define HUGE        MAXFLOAT
#endif /* __BSD_VISIBLE */

/*
 * Most of these functions depend on the rounding mode and have the side
 * effect of raising floating-point exceptions, so they are not declared
 * as __pure2.  In C99, FENV_ACCESS affects the purity of these functions.
 */

/*
 * ANSI/POSIX
 */
int __fpclassifyd(double) __pure2;
int __fpclassifyf(float) __pure2;
int __fpclassifyl(long double) __pure2;
int __isfinitef(float) __pure2;
int __isfinite(double) __pure2;
int __isfinitel(long double) __pure2;
int __isinff(float) __pure2;
int __isinfl(long double) __pure2;
int __isnanf(float) __pure2;
int __isnanl(long double) __pure2;
int __isnormalf(float) __pure2;
int __isnormal(double) __pure2;
int __isnormall(long double) __pure2;
int __signbit(double) __pure2;
int __signbitf(float) __pure2;
int __signbitl(long double) __pure2;

double  acos(double);
double  asin(double);
double  atan(double);
double  atan2(double, double);
double  cos(double);
double  sin(double);
double  tan(double);

double  cosh(double);
double  sinh(double);
double  tanh(double);

double  exp(double);
double  frexp(double, int *);   /* fundamentally !__pure2 */
double  ldexp(double, int);
double  log(double);
double  log10(double);
double  modf(double, double *); /* fundamentally !__pure2 */

double  pow(double, double);
double  sqrt(double);

double  ceil(double);
double  fabs(double) __pure2;
__BIONIC_MATH_INLINE(double fabs(double x) { return __builtin_fabs(x); })
double  floor(double);
double  fmod(double, double);

/*
 * These functions are not in C90.
 */
#if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999 || __XSI_VISIBLE
double  acosh(double);
double  asinh(double);
double  atanh(double);
double  cbrt(double);
double  erf(double);
double  erfc(double);
double  exp2(double);
double  expm1(double);
double  fma(double, double, double);
double  hypot(double, double);
int ilogb(double) __pure2;
# if !defined __cplusplus || __cplusplus < 201103L /* Conflicts with C++11.  */
int (isinf)(double) __pure2;
#endif
int (isnan)(double) __pure2;
double  lgamma(double);
long long llrint(double);
long long llround(double);
double  log1p(double);
double  log2(double);
double  logb(double);
long    lrint(double);
long    lround(double);
double  nan(const char *) __pure2;
double  nextafter(double, double);
double  remainder(double, double);
double  remquo(double, double, int *);
double  rint(double);
#endif /* __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999 || __XSI_VISIBLE */

#if __BSD_VISIBLE || __XSI_VISIBLE
double  j0(double);
double  j1(double);
double  jn(int, double);
double  y0(double);
double  y1(double);
double  yn(int, double);

#ifndef __LITEOS__
#if __XSI_VISIBLE <= 500 || __BSD_VISIBLE
double  gamma(double);
#endif

#if __XSI_VISIBLE <= 600 || __BSD_VISIBLE
double  scalb(double, double);
#endif
#endif /* __BSD_VISIBLE || __XSI_VISIBLE */
#endif

#if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999
double  copysign(double, double) __pure2;
double  fdim(double, double);
double  fmax(double, double) __pure2;
double  fmin(double, double) __pure2;
double  nearbyint(double);
double  round(double);
double  scalbln(double, long);
double  scalbn(double, int);
double  tgamma(double);
double  trunc(double);
#endif

/*
 * BSD math library entry points
 */
#if __BSD_VISIBLE
double  drem(double, double);
int finite(double) __pure2;
int isnanf(float) __pure2;
long double significandl(long double);

/*
 * Reentrant version of gamma & lgamma; passes signgam back by reference
 * as the second argument; user must allocate space for signgam.
 */
double  gamma_r(double, int *);
double  lgamma_r(double, int *);

/*
 * IEEE Test Vector
 */
double  significand(double);
#endif /* __BSD_VISIBLE */

/* float versions of ANSI/POSIX functions */
#if __ISO_C_VISIBLE >= 1999
float   acosf(float);
float   asinf(float);
float   atanf(float);
float   atan2f(float, float);
float   cosf(float);
float   sinf(float);
float   tanf(float);

float   coshf(float);
float   sinhf(float);
float   tanhf(float);

float   exp2f(float);
float   expf(float);
float   expm1f(float);
float   frexpf(float, int *);   /* fundamentally !__pure2 */
int ilogbf(float) __pure2;
float   ldexpf(float, int);
float   log10f(float);
float   log1pf(float);
float   log2f(float);
float   logf(float);
float   modff(float, float *);  /* fundamentally !__pure2 */

float   powf(float, float);
float   sqrtf(float);

float   ceilf(float);
float   fabsf(float) __pure2;
__BIONIC_MATH_INLINE(float fabsf(float x) { return __builtin_fabsf(x); })
float   floorf(float);
float   fmodf(float, float);
float   roundf(float);

float   erff(float);
float   erfcf(float);
float   hypotf(float, float);
float   lgammaf(float);
float   tgammaf(float);

float   acoshf(float);
float   asinhf(float);
float   atanhf(float);
float   cbrtf(float);
float   logbf(float);
float   copysignf(float, float) __pure2;
long long llrintf(float);
long long llroundf(float);
long    lrintf(float);
long    lroundf(float);
float   nanf(const char *) __pure2;
float   nearbyintf(float);
float   nextafterf(float, float);
double  nextafter(double, double);
float   remainderf(float, float);
float   remquof(float, float, int *);
float   rintf(float);
float   scalblnf(float, long);
float   scalbnf(float, int);
float   truncf(float);

float   fdimf(float, float);
float   fmaf(float, float, float);
float   fmaxf(float, float) __pure2;
float   fminf(float, float) __pure2;
#endif

/*
 * float versions of BSD math library entry points
 */
#if __BSD_VISIBLE
float   dremf(float, float);
int finitef(float) __pure2;
float   gammaf(float);
float   j0f(float);
float   j1f(float);
float   jnf(int, float);
float   scalbf(float, float);
float   y0f(float);
float   y1f(float);
float   ynf(int, float);

/*
 * Float versions of reentrant version of gamma & lgamma; passes
 * signgam back by reference as the second argument; user must
 * allocate space for signgam.
 */
float   gammaf_r(float, int *);
float   lgammaf_r(float, int *);

/*
 * float version of IEEE Test Vector
 */
float   significandf(float);
#endif  /* __BSD_VISIBLE */

/*
 * long double versions of ISO/POSIX math functions
 */
#if __ISO_C_VISIBLE >= 1999
long double acoshl(long double);
long double acosl(long double);
long double asinhl(long double);
long double asinl(long double);
long double atan2l(long double, long double);
long double atanhl(long double);
long double atanl(long double);
long double cbrtl(long double);
long double ceill(long double);
long double copysignl(long double, long double) __pure2;
long double coshl(long double);
long double cosl(long double);
long double erfcl(long double);
long double erfl(long double);
long double exp2l(long double);
long double expl(long double);
long double expm1l(long double);
long double fabsl(long double) __pure2;
__BIONIC_MATH_INLINE(long double fabsl(long double x) { return __builtin_fabsl(x); })
long double fdiml(long double, long double);
long double floorl(long double);
long double fmal(long double, long double, long double);
long double fmaxl(long double, long double) __pure2;
long double fminl(long double, long double) __pure2;
long double fmodl(long double, long double);
long double frexpl(long double value, int *); /* fundamentally !__pure2 */
long double hypotl(long double, long double);
int     ilogbl(long double) __pure2;
long double ldexpl(long double, int);
long double lgammal(long double);
long long   llrintl(long double);
long long   llroundl(long double);
long double log10l(long double);
long double log1pl(long double);
long double log2l(long double);
long double logbl(long double);
long double logl(long double);
long        lrintl(long double);
long        lroundl(long double);
long double modfl(long double, long double *); /* fundamentally !__pure2 */
long double nanl(const char *) __pure2;
long double nearbyintl(long double);
long double nextafterl(long double, long double);
double      nexttoward(double, long double);
float       nexttowardf(float, long double);
long double nexttowardl(long double, long double);
long double powl(long double, long double);
long double remainderl(long double, long double);
long double remquol(long double, long double, int *);
long double rintl(long double);
long double roundl(long double);
long double scalblnl(long double, long);
long double scalbnl(long double, int);
long double sinhl(long double);
long double sinl(long double);
long double sqrtl(long double);
long double tanhl(long double);
long double tanl(long double);
long double tgammal(long double);
long double truncl(long double);
#endif /* __ISO_C_VISIBLE >= 1999 */

#if __BSD_VISIBLE
long double lgammal_r(long double, int *);
#endif

#if defined(__USE_GNU)
void sincos(double, double*, double*);
void sincosf(float, float*, float*);
void sincosl(long double, long double*, long double*);
#endif /* __USE_GNU */

#pragma GCC visibility pop
__END_DECLS

#endif /* !_MATH_H_ */
